This toshiba laptop has a duo processor also. Here's what I did like 4 x. I booted using the original win98 cd repartitioned, deleted all dos and non dos partitions, then formated. Then I rebooted with winxp original cd, it went thru the process of a clean install, it partitioned and formated then started the install then it restarted as normal during the install it showed 39% remaining on the install then it stopped and hung up @34% and would not go any further. Instead of the F6 I did push F5, there was only one option there 486 so I choice it, If I dont F5 it the setup stops on reboot with an error message windows has stopped to avoid damage etc with the famous windows error code 0x0000007E, which windows shows has something to do with sp3, then a pci error code shows, so I have to push F5 in order for the install to work. So since it kept hanging @ 34% after several tries, I repartioned and reformated again same problem except it doesn't let me do a clean install, it ask if I want to repair or install, I have tried both neither work, it goes directly to setup page starting 39% remaining and hanging up @ 34%....so evidently this process is not removing all the files or system from this computer....and why is winxp setting up my drive as 1 instead of c ?